So... how to test series plugs? Pull them and check
resistance/brokenness individually? Or as an easier alternative, maybe
check volatage to ground along the glow string with the knob pulled
out,
and look for voltage to drop to zero at the bad plug/resistor wire?
You initially probe between ground and interesting points looking
for where voltage stops. (With no current flow all 'hot' points
will be 12V. Operating correctly, every point in the system will
be at a different voltage. Once all breaks are found and rectified
you can measure across the two terminals of each of the GP's and
you should see approximately 1V dropped across each one. The
remainder is dropped in the toaster racks, and the salt shaker.
Wasted, so far as starting the engine goes.
-- Jim
